Lottery officials are set to introduce the winner of last week's $310.5 million Powerball game.
The Michigan Lottery says a Tuesday news conference is planned to identify the winner.
The Three Rivers West Shell station in the southwestern Michigan community of Three Rivers sold the only winning ticket for last Wednesday night's drawing.
The jackpot can be paid over 30 years, or the winner can choose a lump sum of about $197 million before taxes.
The gas station is 30 miles south of Kalamazoo.
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